What a mizuya is
A mizuya is the preparation space attached to a Chashitsu, where bowls and kettles are washed and the utensils are set out before and after a gathering.
It adjoins the tea room directly. The Tamura Residence tea room in Kyoto, from the late Edo period, is described as having a service opening into the lean-to on its north side and a tiled preparation room projecting to the west.
It is sometimes the larger of the two spaces. The tea house at Chikushi Jogakuen in Fukuoka Prefecture, built in 1940, places a four-and-a-half-mat tea room to the north and a six-mat preparation room to the south, with a sunken brazier in the preparation room as well as in the tea room itself.
The Obaian in Sakai, Osaka Prefecture, from the mid-Edo period, is described as an eight-mat room adjoining a three-mat tea room, with a service area and a preparation room behind them.
The same word in a farmhouse
The term is not confined to tea. The former Yoshida Residence in Chiba Prefecture, built in 1854, is recorded as an Important Cultural Property whose structure field lists a kitchen of 4.4 by 5.3 metres and a water room of 4.7 by 5.3 metres, both Kirizuma-zukuri with Sangawara-buki, each counted as a separate structure.
That building is not a tea preparation room but a place for cooking and water work. The same word covers two different things, and which one is meant depends on the setting.
When writing about a building, say which sense applies. Whether the record lists the room beside a tea room or beside a kitchen is the clue that settles it.
References
- Agency for Cultural Affairs: Registered tangible cultural properties (structures)
- https://www.bunka.go.jp/seisaku/bunkazai/shokai/yukei_kenzobutsu/toroku_yukei.html
- National Cultural Properties Database: Tamura Residence tea room, with a noble's entrance, a crawl-in door and a service opening
- https://kunishitei.bunka.go.jp/bsys/maindetails/101/00009338
- National Cultural Properties Database: Chikushi Jogakuen tea house, a four-and-a-half-mat room with a six-mat preparation area
- https://kunishitei.bunka.go.jp/bsys/maindetails/101/00009078
- National Cultural Properties Database: Obaian tea room in Sakai, moved twice before reaching its present site
- https://kunishitei.bunka.go.jp/bsys/maindetails/101/00003115
- National Cultural Properties Database: former Yoshida Residence, its kitchen and water room each recorded with dimensions
- https://kunishitei.bunka.go.jp/bsys/maindetails/102/00004456
Last verified: 2026.08.31